Lea-Anne,
Fortunately, mistakes can be helpful in the sense that we can learn from them. I think in part, that's what an "experienced" instructor brings to the table: a history of mistakes behind them. Failure to learn will only result in the same outcome. But, I've found students are usually willing to forgive mistakes made by their instructor, as long as the instructor is sincere and doesn't make excuses for errors.
Barry Westling
